Cookies are small text files stored on a user\u2019s device by a website. They help websites remember user information, preferences, login sessions, and browsing activities to improve the user experience.<\/p>\n\n\n\n
Cookies are widely used in web development to personalize content, manage sessions, and track website performance.<\/p>\n\n\n\n
By the end of this training, you will be able to:<\/p>\n\n\n\n
Cookies are data files created by a website and saved in the user\u2019s browser. Each time the user visits the website again, the browser sends the cookie data back to the server.<\/p>\n\n\n\n
Cookies help websites:<\/p>\n\n\n\n
The process of cookies works as follows:<\/p>\n\n\n\n
This allows the website to recognize returning users and remember information.<\/p>\n\n\n\n
Session cookies are temporary cookies that are deleted when the browser is closed.<\/p>\n\n\n\n
Uses:<\/p>\n\n\n\n
Persistent cookies remain stored on the device until they expire or are manually deleted.<\/p>\n\n\n\n
Uses:<\/p>\n\n\n\n
These cookies are created directly by the website the user visits.<\/p>\n\n\n\n
Uses:<\/p>\n\n\n\n
These cookies are created by external services or advertisers connected to the website.<\/p>\n\n\n\n
Uses:<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
<?php
setcookie(\"username\", \"Ali\", time() + 3600);
echo \"Cookie Created\";
?><\/code><\/pre>\n\n\n\nExplanation:<\/p>\n\n\n\n
\n- username is the cookie name<\/li>\n\n\n\n
- Ali is the cookie value<\/li>\n\n\n\n
- time() + 3600 sets the cookie expiry time to one hour<\/li>\n<\/ul>\n\n\n\n
Reading Cookies in PHP<\/h2>\n\n\n\n<?php
echo $_COOKIE[\"username\"];
?><\/code><\/pre>\n\n\n\nDeleting Cookies in PHP<\/h2>\n\n\n\n<?php
setcookie(\"username\", \"\", time() - 3600);
echo \"Cookie Deleted\";
?><\/code><\/pre>\n\n\n\nCookies in JavaScript<\/h2>\n\n\n\nCreating a Cookie<\/h3>\n\n\n\ndocument.cookie = \"username=Ali\";<\/code><\/pre>\n\n\n\nReading Cookies<\/h3>\n\n\n\nconsole.log(document.cookie);<\/code><\/pre>\n\n\n\nSecurity Best Practices<\/h2>\n\n\n\n
To use cookies safely:<\/p>\n\n\n\n
\n- Avoid storing sensitive information in cookies<\/li>\n\n\n\n
- Use secure cookies on HTTPS websites<\/li>\n\n\n\n
- Set expiration dates carefully<\/li>\n\n\n\n
- Use HttpOnly cookies for security<\/li>\n\n\n\n
- Inform users about cookie usage<\/li>\n<\/ul>\n\n\n\n
Cookie Privacy and Consent<\/h2>\n\n\n\n
Many countries require websites to inform users about cookie usage. Websites often display cookie consent banners to comply with privacy laws.<\/p>\n\n\n\n
Common privacy regulations include:<\/p>\n\n\n\n
\n- GDPR<\/li>\n\n\n\n
- CCPA<\/li>\n<\/ul>\n\n\n\n
Real World Uses of Cookies<\/h2>\n\n\n\n
Cookies are commonly used in:<\/p>\n\n\n\n
\n- E-commerce websites<\/li>\n\n\n\n
- Social media platforms<\/li>\n\n\n\n
- Learning management systems<\/li>\n\n\n\n
- Banking applications<\/li>\n\n\n\n
- Online forums<\/li>\n<\/ul>\n\n\n\n
Career Applications<\/h2>\n\n\n\n
Understanding cookies is important for:<\/p>\n\n\n\n
\n- Web Developers<\/li>\n\n\n\n
- Backend Developers<\/li>\n\n\n\n
- Frontend Developers<\/li>\n\n\n\n
- Cybersecurity Professionals<\/li>\n\n\n\n
- Digital Marketing Specialists<\/li>\n<\/ul>\n\n\n\n
Final Presentation<\/h2>\n\n\n\n
In your final presentation, explain:<\/p>\n\n\n\n
\n- What cookies are<\/li>\n\n\n\n
- How cookies work<\/li>\n\n\n\n
- Types of cookies<\/li>\n\n\n\n
- Benefits and risks of cookies<\/li>\n\n\n\n
- Creating cookies using PHP and JavaScript<\/li>\n\n\n\n
- Cookie privacy and security practices<\/li>\n<\/ul>\n\n\n